It happened around 6:20 p.m. in the 6600 block of Crenshaw Boulevard.
[Ads /]
When officers arrived, they found the victim, identified as Francisco Alonzo, inside the dispensary suffering from a gunshot wound.
He was pronounced dead at the scene.
"During the preliminary investigation, it was determined that Alonzo worked at the location as a security guard and became involved in a dispute with the suspect possibly during the commission of a robbery," police said in a statement.
Police did not release information on a suspect or suspects. Investigators previously said they were looking for three suspects.
[Ads /]
Anyone with information is urged to call the South Bureau Homicide Division 77th Squad at 323-786-5100 or 323-786-5500.
If you'd like to remain anonymous, you can call L.A. Regional Crime Stoppers at 1-800-222-TIPS (800-222-8477) or visit the Crime Stoppers website.